SA2B-M3/5AT Equivalent & Substitute Parts

Part Overview

The SA2B-M3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 100 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as Active and complies with ROHS3 and REACH standards. Equivalent and substitute parts are identified based on matching or superior electrical characteristics within the same package form factor, enabling direct replacement in circuit designs where the specified performance parameters are met.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 2 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	3 µA @ 1000 V	µA
Capacitance @ Vr, F	11	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SA2B-M3/5AT is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 2 A minimum
Package / Case: DO-214AC, SMA (surface mount)
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max): Must not exceed application requirements
Reverse Recovery Time (trr): Standard or faster recovery acceptable
Operating Temperature Range: Must encompass application operating conditions
RoHS and MSL Compliance: Must match or exceed regulatory requirements

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalents (Full 2A Rating): Parts SA2B-E3/5AT and SA2B-E3/61T maintain identical electrical specifications to the main part, differing only in packaging tape configuration (5AT vs. 61T). These provide direct replacement with no circuit performance change.

Category 2 - Functional Substitutes (Reduced Current Rating): Parts ES1B-13-F, ES1B-LTP, EGF1B, GF1B, and GS1B-LTP are rated for 1 A average rectified current. These are suitable for applications where the circuit current requirement does not exceed 1 A, despite the main part's 2 A capability.

Category 3 - Full-Rating Alternatives (2A Rating): Parts ES2B-LTP and ES2BA-13-F maintain the 2 A current rating with improved forward voltage characteristics and faster recovery times, offering enhanced performance in equivalent applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Package	Status
SA2B-M3/5AT	Vishay	100	2	1.1 @ 2A	1.5 µs	DO-214AC	Active
SA2B-E3/5AT	Vishay	100	2	1.1 @ 2A	1.5 µs	DO-214AC	Active
SA2B-E3/61T	Vishay	100	2	1.1 @ 2A	1.5 µs	DO-214AC	Active
ES2B-LTP	Micro Commercial Co	100	2	0.95 @ 2A	35 ns	DO-214AC	Not For New Designs
ES2BA-13-F	Diodes Incorporated	100	2	0.92 @ 2A	25 ns	DO-214AC	Active
ES1B-13-F	Diodes Incorporated	100	1	0.92 @ 1A	25 ns	DO-214AC	Active
ES1B-LTP	Micro Commercial Co	100	1	0.95 @ 1A	35 ns	DO-214AC	Not For New Designs
EGF1B	Fairchild Semiconductor	100	1	1.0 @ 1A	50 ns	DO-214AC	Active
GF1B	onsemi	100	1	1.0 @ 1A	2 µs	DO-214AC	Not For New Designs
GS1B-LTP	Micro Commercial Co	100	1	1.0 @ 1A	Not Specified	DO-214AC	Not For New Designs
ES1B	YAGEO	100	Not Specified	0.95	Not Specified	DO-214AC	Active

Engineering Selection Recommendations

For Direct Replacement (Full 2A Capability):

SA2B-E3/5AT and SA2B-E3/61T are parametric equivalents to SA2B-M3/5AT. Both parts are manufactured by Vishay with identical electrical specifications. Selection between these three parts depends on tape configuration availability and supply chain requirements. All three maintain Active status and full ROHS3 compliance.

ES2BA-13-F (Diodes Incorporated) provides an alternative 2A-rated substitute with improved performance characteristics: lower forward voltage (0.92 V vs. 1.1 V @ 2A) and faster reverse recovery time (25 ns vs. 1.5 µs). This part is Active and suitable for new designs.

ES2B-LTP (Micro Commercial Co) offers 2A capability with comparable forward voltage (0.95 V) and recovery time (35 ns) but carries "Not For New Designs" status, limiting its use to legacy system maintenance or inventory management.

For Current-Limited Applications (1A Maximum):

ES1B-13-F (Diodes Incorporated) is the recommended 1A substitute for applications where circuit current does not exceed 1 A. This part is Active, offers superior forward voltage characteristics (0.92 V @ 1A), and features fast recovery time (25 ns).

EGF1B (Fairchild Semiconductor) provides an alternative 1A option with Active status and moderate recovery time (50 ns).

GF1B (onsemi) and GS1B-LTP (Micro Commercial Co) are 1A-rated alternatives but carry "Not For New Designs" status and should be reserved for legacy applications only.

Compliance and Regulatory Considerations:

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental qualifications. Parts designated as Active are preferred for new circuit designs; parts marked "Not For New Designs" are acceptable only for maintenance, repair, or legacy system support.

Frequently Asked Questions (FAQ)

Q: Can ES1B-13-F replace SA2B-M3/5AT in all applications?

A: ES1B-13-F is suitable only for applications where the circuit current requirement does not exceed 1 A. The SA2B-M3/5AT is rated for 2 A average rectified current. If your circuit requires 2 A capability, use ES2BA-13-F or SA2B-E3/5AT instead.

Q: What is the difference between SA2B-M3/5AT, SA2B-E3/5AT, and SA2B-E3/61T?

A: These three parts are parametric equivalents manufactured by Vishay with identical electrical specifications (100 V, 2 A, 1.1 V forward voltage, 1.5 µs recovery time). The differences are in tape configuration: M3/5AT uses 5-inch tape, E3/5AT uses 5-inch tape, and E3/61T uses 6-inch tape. Selection depends on your equipment's tape handling capability and supply availability.

Q: Why do some substitute parts show "Not For New Designs" status?

A: Parts marked "Not For New Designs" are legacy components that manufacturers have discontinued for new production. These parts remain available in inventory for maintenance and repair of existing systems but should not be specified in new circuit designs. For new designs, select parts with Active status such as SA2B-E3/5AT, ES2BA-13-F, or ES1B-13-F.

Q: Is the DO-214AC package the same as SMA?

A: Yes. DO-214AC and SMA refer to the same surface mount package form factor. Both designations are used interchangeably in the industry. All substitute parts listed use this identical package, ensuring mechanical compatibility.

Q: What is the significance of forward voltage (Vf) differences between substitutes?

A: Forward voltage affects power dissipation and heat generation in the diode. Lower forward voltage (such as 0.92 V in ES2BA-13-F vs. 1.1 V in SA2B-M3/5AT) results in reduced power loss. For applications sensitive to heat or efficiency, lower Vf substitutes offer improved performance. For general-purpose applications, the difference is typically negligible.

Q: Can I use a 1A-rated diode in a circuit designed for 2A?

A: No. Using a 1A-rated diode in a 2A circuit will cause the diode to exceed its maximum current rating, resulting in excessive heat generation, accelerated aging, and potential failure. Always match or exceed the circuit's current requirement.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance and MSL Level 1 (Unlimited) rating, matching the environmental and regulatory qualifications of the SA2B-M3/5AT.

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